Pendulous bobbin holder



April 17, 1962 J. c. KEYWORTH PENDULOUS BOBBIN HOLDER 2 Sheets-Sheet 2Filed Aug. 11, 1958 IN V EN TOR. W W

James 6.

jm. 972m:

United States Patent M The present invention relates to a pendulousbobbin holder and more particularly to a latch type holder, especiallyadapted for manufacture from plastic materials or die-castings.

It is an object of the present invention to provide a novel bobbinholder which is eifective and reliable in operation and simple andeconomical in construction.

It is another object to provide such a device providing a small numberof moving parts all of which are adapted for fabrication by economicalmethods. Further objects and advantages will be apparent from thefollowing description taken in connection with the accompanying drawingsin which:

FIG. 1 is a side elevation, partly broken away and in section of apreferred embodiment of the invention, showing a bobbin mounted on theholder;

FIG. 2 is a side elevation of the holder shown in FIG. 1, rotatedthrough 90 around its vertical axis;

FIG. 3 is a bottom View of FIG. 2;

FIG. 4 is a detail in perspective of a portion of the bobbin holderillustrated in FIG. 1, showing more particularly the latch and itsindexing means; and

FIG. 5 is a vertical substantially mid-sectional view of a secondembodiment of the invention.

In FIG. 1 of the drawing there is illustrated a bobbin holder comprisingan elongated body 1 which is generally cross shaped in cross section asshown in FIG. 3, and

which is pendulously supported by an anti-friction bearing 2 from a bolt3 fixedly mounted in a member of a spinning frame such as a creel board4. The free lower end of the body 1 is arranged to enter the upper endof a hollow bobbin 5, and has an oblong latch member s rotatably mountedon a horizontal pin 7 in said body and adapted to project therefrom andengage an interior shoulder 8 in the bobbin when the latch is positionedwith its major dimension horizontal, as illustrated.

A centering collar 9 is slidably mounted on the body 1 and is pressedagainst the upper end of the bobbin 5, when it is mounted 011 theholder, by means of a compression spring 11 which bears or is seated atits lower end or convolution on the flange 12 of the collar and at itsupper end or convolution against a shoulder 10 formed by an enlargementof the body 1. In order to limit the travel of the collar 9 on the body1, and to prevent rotation of the collar on said body, vertical flanges13, 14 (FIG. 4) are formed on said body and provided with shoulders 15,16 adapted to be engaged by tangs 17, 18 sheared and bent inwardly fromthe upper cylindrical portion of the collar 9.

The latch 6 is formed by two oblong plate members 19,

Z1 (FIGS. 2 and 4) which are separated by a square ratchet element 22,the three elements of the latch being formed integrally or being rigidlyunified in any suitable manner. Means for indexing the major dimensionof the latch 6 from its horizontal to vertical position and vice versa,is provided in the form of a pawl 23. The pawl 23 is an integralextension of the compression spring 11 formed adjacent the lowermostcoil or convolution of the spring. It extends radially inwardly througha slot 25 in the collar 9, a distance suflicient to cause it to engage achanneled portion of one of the vertical cross members of the elongatedbody 1 and thereafter is axially reposed or nested in the channel so asto extend downwardly into operative engagement with the latch 6. Thedownward Patented Apr. 17, 1962 extension of the pawl 23 passes betweenplates 19, 21 of the latch 6 and is so tensioned as to bear elasticallyagainst the side of the ratchet member 22. Y The pawl is offsetlaterally within the channel adjacent its lower end to provide ashoulder 24. The shoulder 24 is so located on the pawl that, when thecollar 9 is raised by the application of the bobbin 5 to the holder, theshoulder 24 will be raised above the location of the ratchet 22 andsubsequent downward movement of the pawl will engage and rotate theratchet through FIGURE 4 best illustrates the cooperative engagementbetween the pawl 23, the collar and slot 9 and 25, respectively, and thechanneled portion of the vertical cross member of the body 1. Thecombined effect of the slot 25 and the body channel suffices to guideand properly position the pawl.

The collar 9 is illustrated as being slotted as at 25, to enable thepawl to properly engage the body channel. This method provides a facilemethod of assembly. The compressive force exerted by the spring 11between the shoulder 10 and the flange 12 of the collar is sufiicient toovercome any tendency towards undesirable relative movement between thecollar 9 and the pawl 23 due to the slot opening above the radialextension of the pawl. If relative movement were of concern, then asmall circular aperture could be substituted for the axial slot 25thereby preventing any independent movement between the collar andspring. This alternate method would, to a degree, complicate theassembly of the holder.

In the operation of this embodiment of the invention, the majordimension of latch 6 will normally be in its vertical position so thatit does not project out of the holder when the holder is not occupied.When it is desired to mount a bobbin on the holder, it is pushed up frombelow, engaging the collar 9 and moving it upward until the verticalmovement is arrested by engagement of the lugs 17, 18 with the shoulders15. At this time the internal shoulder -8 of thebobbin is substantiallyabove the position of the latch 6 and upon downward movement of thebobbin and collar 9, the shoulder 24 of pawl 23 engages the ratchetmember 22 and rotates the major dimension of latch to its horizontalposition so as to arrest the downward movement of the bobbin and retainit on the holder. Release of the bobbin is brought about by a repetitionof the reciprocation of the collar 9, thus indexing the major dimensionof latch '6 to its original vertical position.

In FIG. 5 of the drawing, there is illustrated a second embodiment ofthe invention in which the body 51 of the holder is tubular, and collar52 slidably mounted thereon has tangs 53, 54 extending throughdiametrically arranged axial slots 55, 56 to support or seat the bottomconvolution of the pawl spring 57 housed therein.

The latch 58 is pivoted on the pin 59 within the body 51 of the holderand projects through openings 61, 62 in said body when its majordimension is horizontal.

The remaining parts of the bobbin holder and its mode of operation arethe same as in the embodiment previously described.

Although two embodiments of the invention have been shown and describedin detail, it will be understood that changes may be made in the designand arrangement of the parts without departing from the spirit of theinvention.

I claim:

1. In a latch type pendulous bobbin holder: an elon-,

gated body member insertable in the upper end of a hollow bobbin; meansfor pendulously and rotatablysupporting said body; a collar mounted forlimited sliding movement on the body and including an outwardlyextending flange at its lower end providing an integral spring seat; aspring surrounding the body and collar and having the lowermostconvolution engaging the seat to urge said collar toward its lowermostposition on the body; an oblong latch member pivoted in said body on ahorizontal axis below said collar and arranged to project therefrom forengagement with an internal shoulder in the bobbin when the latch ispositioned with its major dimension in a horizontal plane; means forindexing the latch to bring it into and out of projecting position,including a ratchet on said latch, said spring providing a singleintegral elastic pawl member extending downwardly within said body toyieldably bear against the ratchet whereby the ratchet is restrainedagainst undesirable rotational displacement, said pawl including ashoulder adjacent its lower end in position to engage said ratchet androtate the latch by downward movement of the pawl; said collar and bodybeing slotted to allow insertion of the pawl portion of the spring intooperative position relative to the latch; and, said body having meansproviding a guide for vertical move ment of the pawl member.

2. In a latch type pendulous bobbin holder: an elongated substantiallycross-shaped body member insertable in the upper end of a hollow bobbin;means for pendulously and rotatably supporting said body member; acollar including an inwardly extending tang mounted for limited slidingmovement on the body member, said collar providing an integral springseat; shoulder means formed on a cross-arm of said body memberengageable by said tang to limit the movements of said collar; an oblonglatch member formed of a pair of similar elements spaced axially by aratchet member located therebetween pivoted in said body member on ahorizontal axis below said collar, said spaced elements arranged toproject from said body for engagement with an internal shoulder in thebobbin when the latchi's positioned with its major dimension in ahorizontal plane; a spring having the lowermost convolution engagingsaid seat and urging said collar towards its lowermost position on thebody, said spring providing a single integral elastic pawl memberadapted for cooperation with the ratchet member for indexing the latchto bring it into and out of projecting position, said pawl memberextending downwards within a cross-arm of said body to yieldably bearagainst the ratchet member whereby the ratchet member is restrainedagainst undesirable rotational displacement, said pawl being guidedduring vertical movements by said spaced elements, and said pawlincluding further a shoulder adjacent its lower end in position toengage said ratchet to rotate the latch responsive to downward movementof the pawl.

Nichols Jan. 4, 1910 Noguera Oct. 1, 1946

